Siren



FIG. 1 is a perspective view of a siren for showing a new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a rear elevational view thereof; and,

FIG. 8 is a detail view thereof, wherein the siren has a bowed shape andthe siren comprises a protuberant assembly on two sides of the siren tofacilitate the emplacement and disassembly of the siren, animpeller-like vocal hole is located on a front end of the siren toenlarge the sound, a metal frame is fixed on a bottom of the siren tomaintain the siren on a horizontal plane, and a screw is located on thebottom of the siren to adjust an angle of elevation of the siren.

The ornamental design for a siren, as shown and described.